3. Men's Health: 15-Minute Workout

Guys who want maximum results, but have minimum time, should check out this offering from Men’s Health. As a publication specializing in all things fitness-related for men, these guys have a solid background in what exercises work. Four separate 15-minute workouts are geared toward total body muscle training, fat burning, toning your midsection, and strengthening your lower body. Go through all four workouts in one session when you have the chance or simply squeeze in 15 minutes as often as possible when your schedule is packed.